User's Manual

SBS
-
900 Shore
Ba
Ba
sed
Radar Systems
Chapter
10
10
:
Corrective maintenance
KH
KH
-
1602 2
issue 1
:
Standard SBS900 Systems Operator & Maintenance Handbook
Page
166
of
240
10.7.10.2
R
emoval & replacement
The following process shows the removal of a single X
-
@?LB6F?PN( WC\ NPMACQQMP
located in the
left
hand side of the enclosure
.
The removal and replacement processes are
exactly the
same for the
removal of the
right hand
processor
Prior to undertaking this task, maintainers should familiarise themselves with the processes detailed
below
.
Removal
a)
a)
Fully isolate the entire system
from all power sources including any UPS services.
b)
b)
As a safety precaution, switch OFF the AC mains breaker(s) located within the transceiver
enclosure.
c)
c)
To improve access, remove and retain the clear cover over the power supply unit.
CAUTION:
When AC power is removed,
residual
DC
voltages will be present for a short
period on the terminals of the capacitors within the power supply unit
d)
d)
Noting the positions, orientation and connector numbers, d
isconnect
ALL
internal
connections
to
the
Rb[ljDs_x
processor as detailed below:
-
SK6
(transmitter power), located on the top left
hand side of the unit.
-
PL2
(digital supply), also located on the top left
hand side of the unit.
-
SK1
(encoder)
and
PL1
(
CANBus
)
, located on
the top right hand side of the unit.
-
SK5
(Blanking), located on the right hand side of
the unit.
-
Fibre Optic cable:
C
arefully note the positions
of each cable and gently remove.
Note:
The D
type connectors have sliding metal
retainer
which must be moved fully one way
before
the connector can be removed.
Locked
Unlocked
e)
e)
Interconnections:
There are two interconnecting connectors
on the top of the processor which
can be removed to improve access. These must be replaced and returned with the processor.
X
band
6F?PN( WC\ NPMACQQMPQFMUGLEAMLLCARMPQ